计算机应用与软件2017，Vol.34Issue(8)：136-144,9.DOI:10.3969/j.issn.1000-386x.2017.08.025
基于多个网络接口的DASH系统设计与实现
DESIGN AND IMPLEMENTATION OF DASH SYSTEM BASED ON MULTIPLE ACCESS NETWORKS
摘要
Abstract
In dynamic adaptive streaming over HTTP, a client is able to switch between several video bitrates to cope with varying network conditions.The state-of-the-art adaptation algorithms are mainly designed to serve DASH flow on a single link.In view of multiple wireless interfaces equipped in mobile devices and the dominance of short Internet videos, we develop a predictive adaptive streaming system over LTE/Wi-Fi multiple access networks, namely PASM.PASM improves DASH performance through two orthogonal but complementary approaches.On one hand, PASM aggregates the bandwidth of LTE and Wi-Fi links for better video qualities, while inducing out-of-order chunk arrivals due to varying and heterogeneous bandwidth of each link.On the other hand, when the remaining video length is relatively short, we adopt a more aggressive algorithm to determine which chunk bitrate should be chosen, which leads to the increased average bitrate and reduced the number of bit-rate switching.Experimental studies show that PASM can guarantee the smooth video bitrate switching, and meanwhile increases the average video bitrate in various network conditions.关键词
DASH/多接口网络/乱序Key words
DASH/Multiple access networks/Out-of-order分类
信息技术与安全科学引用本文复制引用
周传杰,陈哲,张旭,徐跃东..基于多个网络接口的DASH系统设计与实现[J].计算机应用与软件,2017,34(8):136-144,9.基金项目
国家自然科学基金项目(61402114). （61402114）
